The ghost of a skylark visits Shouxue, which leads to her hearing the tale of the Skylark Princess and her tragic death.

Two ghosts from Gaoujun's past continue to haunt him, as Shouxue and the eunuch Wei Qing investigate the cause. The answer may lie in the depths of the red-light district...

Yi Siha, a eunuch serving Feiyan Palace, visits Ye Ming Palace. He has seen the ghost of a boy holding a blue swallow feather and asks Shouxue to help him. During her investigation, Shouxue comes across Yi Siha being caned by some older eunuchs. When she stops the punishment, Yi Siha's mentor Kang Lan trembles with fear. In Shouxue's eyes he saw a horrifying monster.